Drive chain and gear.



H. B. LAYMAN.

DRIVE CHAIN AND GEAR. APPLICATION FILED JULY 22, 1913. RENEWED MAY 8. 19l6.

Patented Mar. 12, 1918.

2 SHEETS-SHEET I.

r I v 5 vwe wto'a qwi bwmo 0 m VJ a 5% n WW Z M m H. B. LAYMAN.

DRIVE CHAIN AND GEAR.

APPLICATION FILED JULY 22, I913- RENEWED MAY 8, 1916.

1,259,027. 7 Y Patented Mar. 12, 1918.

' Z 2 SHEETS-SHEET .2

wank/awe Woe m/co-z i3}? J 32 m; aumggjlj ggf UNITED STATES PATENT OFFICE.

amnion rs. LAYMAN, or NEW roan, n. Y., assionon on ons-room's IO 1*. n. LONAS,

on NEW Yong, n. Y,

muvn CHAIN m GEAR.

I Specification of Letters Patent. 12311311139,-d Mar. 12, 1918.

Application filed July 22, 1913, Serial No. 780,420. Renewed May 8, 1918. Serial No. 96,253.

To all whom it may concern:

Be it known that I, Harmon B. LAYMAN, a citizen of the United States, and residing at Manhattan, in the county of New York and State of New York, have invented certain new and useful Improvements in Drive Chains and Gears, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to chains, especially multiple strand chains and particularly driving chains, and more particularly, but not solely, to silent. or angular-toothed chains. 1

An object of this invention is to increase the effective bearing area of the links comprising the chain; another object is to increase the contact of the links with the gear;

another is to providea drive chain in which great strength is secured in proportion to its width and weight. Other objects will appear hereafter in the specification and in the claims, discernible to those skilled in the art.

.The invention is fully disclosed in the following specification, of which the accom-- panying. drawings form a part, in which the separate parts of my invention are designated by suitable reference characters In each of the views, and in which Figure 1 is aside view of a part of a gear or sprocket wheel, having a piece of my improved drive chain mounted thereon, and part of which is in section Fig. 2 a horizontal sectional view of a part of the drive chain' extended Fig. 3 a plan view of the part of the drive chain shown in Fig. 2;

Fig. 4 a transverse section 44. of Fig. 2;

Fig. 5 a view similar to Fig. 2, but showing a modification.

Fig. 6 a sideview of one of the central or intermediate links of my improved drive chain;

. Fig. 6 a cross sectional view on either of the lines 66 of Fig. 6;

on the line side links of my improvedchain Fig. 7 a section on either of the lines 7-7 of Fig. 7;

Fig. 8 a view similar to Figs. 6 and 7 but showlng a modified form of link used in a chain designed "to gear on both sides of the pitch line;

central web or body around the pin holes 11 Fig, 9 a side view of a side plate in Fig. 5. r

In the accompanying drawing a is a part of the rim of a gear or sprocket wheel that shown may be used with my new chain. Its sprocketsor teeth a are cut to form circumferential recesses a to receive the central Web portions of the intermediate links of the chain. The ends of said teeth being also provided with recesses a, to receive the links.

portions of the side The chain 7) is composed of side linked, i v

sprockets 0? having bearing surfaces 0 which operate on the teeth a of the gear a, and the arc-shaped bearings c on the outer side of the hub or hub flanges c are thicker or deeper in transverse section. than said hub flanges or bearings 0 as is clearly shown in Fig. 6 The central web or body portion between the teeth 0 is cut out or removed to form an arc-shaped recess 0.

The side links (Z are similar to the central links 0 except that the web or body portion d is provided only on one side with a pivot bearing d and an' arc-shaped bearing (i The links are connected to form the chain by tie pins 6 passed through the pin holes of the central and side links, and said pins are provided at their opposite ends with washers f, in the form of construction shown, which bear on the side links and the ends of said pins are riveted, as shown at c.

When the links are connected as shown in Figs. 2 and 3, the side and central links to- "Fig. 7 an inner side view of one of the gether have a bearing on the entire surface of the pins, and the pivot bearings c are inclosed and borne upon by the arc-shaped bearings 0 and the pivot bearings d: and the supplemental arc-shaped bearings dinterlock with the corresponding bearings of the adjacent central links, as is also clearly shown in Fig. 2, and strain upon one transverse set of links is distributed over the adjacent links. Thus the danger of shearing or breaking the tie pins is reducedto aminiby way of example, is that as a line drawn between the center of the pin holes 0 and d would divide the body or web portion of the link a proximately centrally thereof,

springing of the links and the consequent alteration of the included angle of the link faces is entirely obviated.

The construction shown in Fig. 51s exactly the same as that shown in Figs. 1 to 4 inclusive except that bushings g are employed on the tie pins e and additional side plates 9 at the sides of the chain.

In Fig. 8 I have shown a link h in all respects similar to link '0 but toothed on both sides of the pitch line. The central portion h of the link it is cut out both at the top and bottom thereof to form an arc-shaped recess h, and projecting sprockets h on both side edges of the link, and in each end portion of the link are concentric bearings k and it corresponding to the concentric bearings c and c of the link a.

I also provide spaces 1: between the side faces of the arc-shaped bearing members and body portions of the links, the object of which is to prevent unnecessary friction oc casioned by abraded material produced in the operation of the chain, collecting between the said surfaces and the body or web portions of the links. and thus; causing a the chain to bind or grip.

My invention is not limited to the exact form of the links herein shown and described, or of the form and arrangement of the concentric and arc-shaped flange bearings c and c, and. d and (Z and changes in and modifications of these features of the construction as herein shown and described, as well as of others, may be made within the scope of the appended claims, without departing from the spirit of my invention or sacrificing its advantages.

In the foregoing description, while I have referred to the reinforcing bearings at and c, and d and d of the central orintermediate links a and the side links d, as annular and concentric-, with the in holes, this need not necessarily be so. concentric members, no matter what position they occupy around the pin holes, operate reinforce and strengthen the links, their chief object is to provide. interlocking link in cross section.

ile all these bearings and to increase the bearing surface of the links on the pins or on the bushings g i when theconstructionshown,in 5 is employed, and in additionto this the concentric flange bearings 0 d and It also serve in connection with the body portions'of the links themselves to provide greater bearing surfaces which operate on the teeth of the gear. v In the accompanying drawings the intermediatelinks 0. are of I-shape in cross section, while the side links d are half I-shape Obviously I may form the chain entirely of links vsuch as d in the accompanying drawings. r I

I do not bind myself to an particular manner of making the links; I may form them by die-casting, or byrcoining, or from sheet metal stampings, or in any. other desired manner, and -while I have shown the reinforcing bearings-c and c of the intermediate links and d and d of the side links.

as made integral with the web or body portion d I do not limit'mymlf to this construction, and I ma apply either or both thesebearings a an a to the body portion.

In the accompanying drawing I have shown the rivets employed as cylindrical but my invention is not limited to any particular. kind, class or form of rivets and any suitable devices of this class may be employed.

7 Having fully described my invention what. I claim as new and desire to secure by Letters Patent, is

l. A chain composed of flat links having pin holes in their opposite ends and coupling pins passed through said holes, said links being also provided around said holes with supplemental annular bearings concentric with said pins and bearing thereon and provided outside of said supplemental annular bearings with additional arc-shaped bearings also concentric with said pins, thearcshaped hearings on one link overlapping the ,110

.lsinl liiplemental annularbearings on another 2. A chain composed of iiat having: pln holes in their opposite ends and couphng pins passed through said holes, said} links being also provided around said holes with supplemental annular bearings concentricv with saidpins and bearing thereon and rovided outside of said supplemental annu ar bearings with additional arc-shaped I bearings also concentric with said pins, the, arc-shaped bearings onflone link overlapping the supplemental annular bearingson an other link, said additional arc shaped bean ings being of greater transverse dimensions shaped bearings of one link overlap and around said holes and inwardly and out- I wardly thereof with concentric interlocking flanged bearings, the flanged bearings at the ends of the body portions of thelinks also forming, in connection withsaid body portions, gear engaging teeth having extended bearing surfaces on which the'teeth of the gear operate.

" 4. In a chain, ailink having a laterally projecting end constituting a gear face, a bearing projecting outwardly beyond the link web, and an arc-shaped bearing adapted to bear upon the bearing of a substan tially similar cooperating link.

5. The comblnation m a chain of two 00- operatlng llnks havlng substantially similar adjoining faces and means coupling the two links; each link havinga projecting pivot bearing and a projecting arc-shaped hearing, the said arc-shaped bearing of each link being adapted to bear upon the pivot bearing of the other link.

- 6. The combination in'a chain of two cooperating links, both apertured to receive a pivot pin, and having substantially simi lar adjoining faces and a pivot pin within said apertures coupling the two links; each link having a pro ecting pivot bearing and a projecting arc-shaped bearing, the said arc-shaped bearing of each link being adapted to bear upon the pivot bearing of the other link.

7. In a chain, a link having in one end and at one side thereof a projecting pivot bearing, and a projecting end constituting a gear face and an arc-shaped bearing.

8. In a chain, a link apertured to receive a pivot pin, and having a protruding convex bearing, and a projecting end constituting an arc-shaped concave bearing.

9 In a chain, a link apertured to receive a pivot p n and having a projecting convex bearing, and a. laterallyprojecting end constituting a gear face and a concave areshaped bearing.

10. In a chain, a link having at one side and in one end thereof. a concave and a convex bearing, both adapted to be borne iippfn by a substantially similar cooperating 11. In a chain, a link having a pair of projecting pivot bearings determining the pitch, and at each end of the link a lateral projection constituting an arc-shaped hearing and a gear face.

12. In a chain, a link having a pivot pin aperture in one end, and at one side of the link and concentric with said pivot pin aperture, a concave and a convex bearlng, both adapted to bear. simultaneously upon a cooperating link when the chain 1s in tension.

13. In a chain, a link having in one end and atone side thereof, a protruding convex pivot bearing, and concentric therewith an extending concave bearing of equal radius. e

14. In a chain, a link having in one end and at one side thereof, a protruding convex pivot bearing, and concentric therewith an extending concave bearing of greater transverse dimension.

15. In a chain, a link having in one end and at one side thereof, a protruding convex bearing, and concentric therewith and of equal radius, a concave bearing.

16. In a chain, a link having in one end and at one side thereof, a protruding convex bearing, and concentric therewith and of equal radius, a concave bearing of greater transverse dimension.

17. In a chain, a link having in one end and at one side thereof, a protruding convex bearing, and concentric therewith and of equal radius, a concave bearing of less than 180 arc length.

18. In a chain, operatively combined, a pair of links which pivot upon each other, with both 'a concave and a convex areshaped bearing on each link.

19. In a chain, operatively combined, a pair of-pivoted links, having, when in tension, a load-sustaining bearing upon each other on both sides of the axis of the bearing.

20. In a chain, operatively combined, a pair of links pivoted upon a bearing, and, having, when in tension, a bearing upon each other on both sides of the pivot axis.

21. In a chain, operatively combined, a pair of links having, when in tension, a

pivot bearing upon each other of more than 180 of the bearing circumference.

22. In a chain, a link having a pivotal connection inon'e endand having at one side thereof and disposed at opposite sides ofthe pivot axis, a protruding convex bearing and a projecting concave bearing of equal radius.

23. In a chain, a link having a pivotal connection in one end and having at one side thereof and disposed at opposite sides of the pivot axis, a protruding convex bearing and a projecting concave bearing of greater transverse dimensions.

24. In a chain, a link having a pivotal connection in. one end and having at one side thereof and disposed at opposite sides of the pivot axis, a protruding convex hearing and a projecting concave bearing of equal radius and of less than 180 arc. length.

25. In a chain, operatively combined, a pair of links having, when in tension, a pivot bearing upon each other of more than 180 of the bearin circumference, said pivot bearing comprised of an arc-shaped bearing upon each link.

26. In a chain, a link having a pin hole, a bearing projecting outwardly beyond the link web, and an arc-shaped bearing adapt.- ed to bear upon the bearing of a substantially similar cooperatin link.

27. In a chain, a link having a pin hole, a bearing projecting outwardly beyond the link Web, and an arc-shaped bearing of greater radius. than said pin hole.

28. In a chain, a link having in one end and at one side thereof, a projection constituting both a gear face and an areshaped bearing, the said arc-shaped bearing being of less than 180 arc length.

29. In a driving chain, a link having on one side in one end portion thereof, a lateral projection constituting a gear face, a bearing, and a supplementar arc-shaped bearing concentric with said caring, both of said bearings projecting outwardly beyond the link web.

stituting a 30. In a driving chain, a link having in one portion thereof a lateral projection conar face, a projecting bearing,- and an arc-s iaped bearing.

31. The combination in a chain, of twocoiiperatin links having substantially similar adjoining faces and means coupling.

' as my invention I have signed my name in presence of the subscribing witnesses this 18th day of July, 1913.

HEBRON B. LAYMAN.

Witnesses FRANCES B. VANDERBILT, SOLOMON BUXBAUM. 

